hydroxymethanesulfinic acid sodium salt; potassium hydrogencarbonate in water; N,N-dimethyl-formamide T=80°C; 20 h;

hydrogenchloride; mercury dichloride 6 h; Heating;

sulfur dioxide; hydroxymethanesulfinic acid sodium salt in N,N-dimethyl-formamide 18 h; Ambient temperature;

1: 96 percent / dimethylformamide / 20 °C / electrolysis; anode: platinum, cathode: mercury pool; lithium perchlorate, potential of -1V (vs saturated calomel electrode) 2: 77 percent / aq. 15percent HCl, HgCl2 / 6 h / Heating View Scheme

1: H2O; methanol 2: 96 percent / dimethylformamide / 20 °C / electrolysis; anode: platinum, cathode: mercury pool; lithium perchlorate, potential of -1V (vs saturated calomel electrode) 3: 77 percent / aq. 15percent HCl, HgCl2 / 6 h / Heating View Scheme

PPA T=140°C; 1.5 h;